Three high refers to hypertension, diabetes, hyperlipidemia, is a common disease in the elderly, diet to light diet, appropriate supplement quality protein, it is recommended to eat more fish, especially marine fish, more soybeans and soy products, poultry, lean meat, etc. can provide high quality protein, eat more food containing unsaturated fatty acids, cholesterol is low, try to use vegetable oil instead of animal oil. Eat more fresh vegetables, fruits and coarse grains to ensure the right amount of dietary fiber and vitamins, garlic, eggplant, reishi, mushrooms, fungus, onions and kelp can be eaten properly. In addition to dietary attention, you should also pay attention to proper exercise, quit smoking and limit alcohol. More importantly, we should actively apply medications to control blood pressure, blood sugar and blood lipids normally, and follow up regularly to prevent the occurrence of complications.